On Tue, 2 Mar 2004, Manoj Srivastava wrote: > § 3.6.3 Command substitution > > ... > > lines 474-477 > > Within the $(command) form, all characters following the open > parenthesis to the matching closing parenthesis constitute the > /command/. Any valid shell script can be used for /command/, except > > -- A script consisting solely of redirections produces unspecified > results You need to show us what posix defines as a command.